3) if you are working on the part of 5-15 minutes, time-stamping (every 30 seconds) should start at:.

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17 a tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. however, he found that if he increases the speed by 20 km/h he can cover the same distance in 30 minutes less time than it was planned. what was the planned speed of the tourist, in km/h?

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